Ultrathin nickel boride nanosheets anchored on functionalized carbon nanotubes as bifunctional electrocatalysts for overall water splitting

Abstract

Carbon nanotubes increase electrochemically active surface area and reduce charge transfer resistance of transition metal borides.

Recent advances in transition metal-based electrocatalysts for alkaline hydrogen evolution

“…In doping strategies, the universally employed dopants include N, 24,243 P, 244,245 Ni, 246 and the combinations of these single elements. 90,246 Recently, Ji and co-authors prepared N, P-codoped Ni x B y , 94,252,253 Co x B y , 254 Fe x B y , 255 Ru x B y , 256 (Figure 21b).…”

“…It is worth mentioning that amorphous TMBs are inevitably oxidized when exposed to air and water, thus forming oxides/hydroxides on the surface. 94,252,254,257 The presence of oxides/hydroxides can benefit the alkaline HER process. For instance, Chen et al…”

“…fabricated the Ni x B/f-MWCNT hybrid by a room-temperature approach (Figure 22a). 94 The Apart from mono-metal borides, ternary borides also exhibit impressive catalytic performance. The introduction of a secondary metal/non-metal element can enhance the catalytic HER activity because of the regulated electronic structure and synergistic effect.…”

A Minireview on Nickel‐Based Heterogeneous Electrocatalysts for Water Splitting

“…Another class of electrocatalyt is Ni-based borides which have been explored to perform promising OER or HER activities. [49] The NiÀ B alloy, a metal-metalloid amorphous structure with attractive structural and electronic characters, usually exhibits better activity than catalysts in crystalline state. [50] They are also often combined with strong and highly covalent metalloidmetalloid bonds (BÀ B).…”

Carbon Nanotube‐Based Non‐Precious Metal Electrode Catalysts for Fuel Cells, Water Splitting and Zinc‐Air Batteries

“…Very recently, Chen et al. reported the preparation of ultrathin nickel boride nanosheets anchored on functionalized carbon nanotubes as bifunctional electrocatalysts (Ni x B/f‐MWNT) for the overall water splitting with performance of a cell voltage of 1.60 V to reach the current density of 10 mA cm −2 and suggested the importance of a strong chemical coupling between Ni x B and f‐MWNTs for the high activity. Liang et al.…”